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Development, Vol 120, Issue 4 853-859, Copyright © 1994 by Company of Biologists

JOURNAL ARTICLES

Autonomy and non-autonomy in Drosophila mesoderm determination and morphogenesis

M Leptin and S Roth
Max Planck Institute fur Entwicklungsbiologie, Tubingen, Germany.

The mesoderm in Drosophila invaginates by a series of characteristic cell shape changes. Mosaics of wild-type cells in an environment of mutant cells incapable of making mesodermal invaginations show that this morphogenetic behaviour does not require interactions between large numbers of cells but that small patches of cells can invaginate independent of their neighbours' behaviour. While the initiation of cell shape change is locally autonomous, the shapes the cells assume are partly determined by the individual cell's environment. Cytoplasmic transplantation experiments show that areas of cells expressing mesodermal genes ectopically at any position in the egg form an invagination. We propose that ventral furrow formation is the consequence of all prospective mesodermal cells independently following their developmental program. Gene expression at the border of the mesoderm is induced by the apposition of mesodermal and non-mesodermal cells.
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© The Company of Biologists Ltd 1994